//
// ========================================================================
// Copyright (c) 1995 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//

package org.eclipse.jetty.util.component;

import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Objects;

import org.eclipse.jetty.util.TypeUtil;

public class DumpableCollection implements Dumpable
{
    private final String _name;
    private final Collection<?> _collection;

    public DumpableCollection(String name, Collection<?> collection)
    {
        _name = name;
        _collection = Objects.requireNonNullElseGet(collection, Collections::emptyList);
    }

    public static DumpableCollection fromArray(String name, Object[] array)
    {
        return new DumpableCollection(name, array == null ? Collections.emptyList() : Arrays.asList(array));
    }

    public static DumpableCollection from(String name, Object... items)
    {
        return new DumpableCollection(name, items == null ? Collections.emptyList() : Arrays.asList(items));
    }

    public static DumpableCollection from(String name, Collection<?> collection)
    {
        return new DumpableCollection(name, collection);
    }

    @Override
    public void dump(Appendable out, String indent) throws IOException
    {
        Object[] array = _collection.toArray();
        Dumpable.dumpObjects(out, indent, this, array);
    }

    @Override
    public String dumpSelf()
    {
        return _name + " size=" + _collection.size();
    }

    @Override
    public String toString()
    {
        return "%s@%x[%s,size=%d]".formatted(TypeUtil.toShortName(this.getClass()), hashCode(), _name, _collection.size());
    }
}

